Laura could have made for fun Young Avenger back in the day. She did eventually join the Avengers Academy afterall.
However unlikely it would be, I would love for Cassie to have her powers without the suit. It could be a power she gets from the Quantum realm same as how Janet has powers. Or maybe she ingest the Pym Particles since their liquid in the MCU. However it is I would love for her to have the powers without the suit. But like you said, the effects would probably be tough to make look real, so she's likely stuck in the suit. I'll accept it if she stomps several bad guys in her oversized sneakers lol.
I'm just waiting for a Marvel game to feature the Young Avengers team in a big game. It's my dream that they'll be in a potential Marvel Ultimate Alliance 4 game. It's probably very unlikely but I would play the heck out of that team in a action RPG. Is MUA still a action RPG?